Optima Batteries OPT8012-021 D34 YellowTop Dual Purpose Battery

(10 customer reviews)


  • 12-Volt, 750 Cold Cranking Amps, Size: 10″ x 6 7/8″ x 7 13/16″ tall, Weight: 42.9 pounds, SAE Post
  • Reserve capacity of 120 minutes for constant performance
  • Optimal starting power even in bad weather
  • Fifteen times more resistant to vibration for durability
  • This item is not for sale in Catalina Island
  • C20 Capacity – 55 Ampere hour



Optima D34 YellowTop battery provides the extra performance and deep-cycling capability that your vehicle demands if it has a lot of accessories like running lights, high-performance stereo/AV system, winches, or hydraulics. The unique SpiralCell design provides a strong and clean power source, ensuring the safety of you, your family and the environment. The Optima battery is ideal for seasonal use because of its very low self-discharge rate. That means you can store your seasonal vehicles all winter without regular charging and still spring out of the starting block when winter is over.

From the manufacturer



OPTIMA YellowTop D34-78 shown above


Our Promise

Ultimate Power, for the ultimate professionals, for the ultimate enthusiasts. And for the ultimate experience. That’s our goal each and every day. We look for every technological advantage to push the limits of what’s possible and leave pretenders in our dust.

We manufacture our own batteries in our own facilities to our demanding standards. To ensure quality and consistency in our batteries, no matter where they are being sold – our batteries are never re-labeled or re-spec’d.

Everything you need

The OPTIMA YellowTop high-performance AGM battery is one of the only true dual-purpose automotive batteries available.

With premium cranking power and unparalleled cycling capability (rechargeability), it is perfect for modern accessory-loaded vehicles. With a 40-year history of technological innovation and engineering OPTIMA products offer unstoppable power for extreme enthusiasts.

Trucks with winches, vehicles with high-demand audio systems and commercial vehicles can all rely on this battery to provide ultimate starting and deep-cycle power.

  • Deep-cycle and cranking power
  • Up to 3x longer life and maintenance-free
  • More than 15 times the vibration resistance
  • Spillproof, mountable in virtually any position
  • Faster recharging and 300+ discharge/recharge cycles

SpiralCell Technology

SpiralCell Technology

At the heart of every OPTIMA battery is a series of individual spiral-wound cells comprised of two pure (99.99%) lead plates coated in a precise coating of lead oxide. One coated plate is positive and the other is negative.

The unique manufacturing process of spiral winding continuous lead plates is far more precision-controlled and expensive than building traditional flat plate AGM batteries. Custom automated cell-winding machines are required to maintain the close tolerances required to maintain quality and performance. Critical tolerances, temperatures, humidity and automated processes are maintained and constantly monitored.

OPTIMA has built over 100 million individual spiral cells since the early 1990’s.

What’s the difference between OPTIMA RedTop, YellowTop, and BlueTop Batteries?





For normal engine starting where an alternator immediately monitors the state of charge and provides energy to the battery whenever it is needed.

This would describe most stock vehicles, including: automotive and RV underhood starting, heavy equipment where starting is the primary function, and diesel vehicles without aftermarket electronics.


Use this when electrical loads are higher than average, or when the discharge cycle is more than typical engine starting, such as vehicles with multiple electronic accessories and vehicles without alternators. This can also include vehicles with a lot of factory electronics such as power sliding doors and a DVD player. Examples also include: racing vehicles without a charging system, dedicated drag racers, diesel powered vehicles with aftermarket electronics, and vehicles with inverters, winches, or other accessories.


The BlueTop starting battery (dark gray case) is to be used when a dedicated starting battery is required and it should never be used for cycling duty. Use a BlueTop starting battery for marine applications and RVs when the battery’s only function is engine starting.

The dual purpose BlueTop (light gray case) can be used for both starting and deep cycling — it is a true deep cycle battery with extremely high cranking power. Uses include: trolling motors, marine applications with heavy electrical accessories, and RVs.

Additional information

Weight 42.9 kg
Dimensions 10 × 6.88 × 7.8 cm
Product Dimensions

10 x 6.88 x 7.8 inches; 42.9 Pounds

Item model number





1 12V batteries required. included



Date First Available

January 18 2007




Optima Batteries

10 reviews for Optima Batteries OPT8012-021 D34 YellowTop Dual Purpose Battery

  1. Trout Girl

    Best Battery I ever owned!Bought this for my old F-100 Pickup takes alot to start it and this bad boy just keeps cranking to get er goin! Def will be back for another one for my other truck when it’s time!

  2. Crucifix Gym

    This battery is coming up on 5 years, constantly being drained and still kicking.Overall, this battery has been reliable and it seems I got a decent one, even though I’ve killed this battery multiple times over the years by draining it by accident, letting it sit too long without starting and maintaining, or other ordinary situations. I probably need to replace it by now, but as long as I keep an eye on the battery being charged between starts, it continues to function.I didn’t know 5 years ago that there was any issue with these batteries being made in Mexico and of lesser quality control, but mine is one of those and has been working great compared to conventional lead acid batteries. 5 years ago I paid almost 100 dollars less than the current price, so I’m not so sure I’d buy another one at these prices, and I’d explore other reliable AGM options first. However, I got a very well performing D34 yellow top to start a 40 year old Jeep that was never a daily driver, and although Amazon says it won’t fit my vehicle, it fits an AMC FSJ perfectly.Whenever I had the chance to keep the battery on a maintainer/charger for a week or two between starts, I did. Over 5 years that 15 or so year old charger didn’t seem as effective so I recently got a new smart charger that has an AGM Mode to see how much more life this Optima battery still has in it. I have my doubts that it’s holding its original charge that it had when it was new, so I’ll have to check it but as long as it isn’t drained it still starts the 360 V8 in cold winter below 30 degrees. The old truck definitely seems to slowly discharge the battery when it sits, so maintenance is a must.I’ve brought this battery back from an almost completely dead state a few times using a slow recharge, so I’ve been satisfied with the resilience of the battery design and the extra deep cycle cranking amps. An ordinary battery would have been wrecked and maybe would need some expert regeneration techniques just to perform like this one has without having to take it out of the engine bay.If I could get another one that works like this one did for the same price it was 5 years ago, I would.

  3. suprine beaute

    Perfect, BUT might need to adjust factory lines.I’ve bought two of these for my 2015 Equinox LT (Mothers vehicle) & 2012 Chevy Malibu LS (personal vehicle), despite the amount of horrible reviews on this page, I researched it this is basically one of if not the best battery. Now while I don’t plan to fully utilize it’s capabilities (maybe I’ll add running AUXILIARY lights), I wanted it because of its impeccable qualities (Cold cranking, long life, not lead acid, amp draw). I do believe it’s worth it for the price, BUT if you need to do alterations on your vehicle consider getting help (I did it myself and as an Engineer it wasn’t to hard just not alot of work room). Totally worth the money.NOTE: The manufacturer was correct and that alot of vehicles won’t work for this.(both my chevys technically aren’t compatible)(Vehicle photos have been provided)Rather: [2012 Chevy Malibu LS] I had to straightened out the termial connectors to make them fit, thank goodness the factory lines have enough slack.(As of January 31, 2022 the Malibu is still running)Rather: [2015 Chevy Equinox LT] This one was the most challenging, since the lines are backwards (meaning when you rotate the battery 180 degrees the male leads are 4inchs too far from the female connectors). I had to cut the original heads off the lines and extend them by 6ins so I’d have plenty of slack. That job took me 5hrs to do and it tuned out near flawless. The only issues is that the bracket that secures the battery is now 1.5ins higher then the original and when you place everything back together the hood closes but there is a slight 3cm gap at the driverside lamp (maybe I’ll correct this later, not a big deal).(As of January 31, 2022 Equinox is still running)

  4. Keith Kwiecien

    great batteryI use it as an extra battery as i am offroading alot. Its very durable and last a long time in my situation.

  5. Pranas K.

    2 Lasted 10 years and one still goingI purchased 2 on Oct 13, 2011, installed them in a 82 CJ7 for 6 years then put one in my 2000 Tacoma v6 and one in a 20kw onan diesel generator. The one in the Tacoma just died a week ago, I had wiring issues and it kept going dead overnight 2 years ago but fixed it more then a year ago… left the lights on last week and now it won’t hold a charge… the one in the generator tests better then the 750cca it should have still…Regular lead acid batteries only last 1.5 to 3 years max here… very happy with the 10 years for 1 and still going for the other… The bad one reads just over 9v but will still start the 2000 Tacoma v6…Buying again for sure.

  6. JULIUS R.

    It’s definitely not the same quality of old Optima batteriesI bought my battery 12/2016 and it’s worked well until 2021. I’m fine in the warmer weather but when the temp drops below freezing I either have to run the vehicle at night or put a charger on it. I’ve had regular batteries from AutoZone last as long as Optima at half the price! I remember Optima use to last 8-10yrs. Now if you get 5/6 consider yourself lucky! I won’t buy another one. Think I’ll try Interstate for my next battery!

  7. Nick and Lea

    Solid Performance and Reliability for any carOptima Yellow top is the absolute best battery you can put in your vehicle. And I will tell why … I put them in all my cars. I have had 6 cars carry the yellow top. They have the cranking power to turn over high compression v-8’s and just recently installed two into my dad’s 2000 Ford F350 Powerstroke 7.3 Diesel. My last yellow top battery lasted 7 years (most batteries last 4-5 years tops), and this battery was used in my 1995 Jeep Wrangler off-road trail rig running a 8000lb winch, 6 off road lights and a stereo with amps and subs.The yellow top is a duel cycle battery. Meaning it is both a starting battery and a deep cycle battery. As a deep cycle battery it will withstand regular discharging and recharging without damage. Where normal batteries will go deceased from multiple discharges/charges. Also these a gel batteries which can be mounted in any position and will not leak. They also withstand vibration better tham common lead-acid batteries which is the most common cause of death to a battery. As a bonus , because they are sealed hydrogen gas will not form over the battery making them safer and corrosion resistant. Stay away from the Red Top , I have tried them 3 times now and they only last about a year before a cell goes dead … at least that has been my experience. I have heard some people with red top lasting 6+ years, others say the same as myself and had problems.Pro tip -Use Solid Zinc Military battery terminals for solid performance and reliabilty.

  8. Brett Alan Powell

    A great batterySo far so good. I installed this in a 98 Jeep ZJ that is only used occasionally and its doing fine. I’ve also been running an Optima red top in my 07 Tundra for well over a year. It too has given me fast starts and a safety buffer for listening to the radio or leaving a small light on.

  9. D.Roe

    Excellent Batteries!Deep cycle batteries work well in my HMMWV.

  10. adrenaline

    Optima fanI bought this battery as an auxiliary battery for my 92 Chevy k1500. It will run my non-service power plus my cargo/camping trailer when hooked up. I bought it, and it sat on the tool box for a month while I waited for Chevrolet to get my OEM auxiliary battery tray. Once I finally got the tray in and installed the battery, I checked the charge, and it was right at 12.8. I haven’t loaded it down yet, but it showed up fully charged and ready to go. I have one of these in my trailer also, it is more than a couple of years old, and I have dragged it down to not registering voltage multiple times with no issues. I did have to fast charge it to get it up high enough to trickle charge it, but it went back to it’s normal self again. I have no doubt this battery will do the same.

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